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Datalogging DAC, ADC

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JamesGon

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Hi,

I want to measure the potential (voltage) difference and current between two dissimilar metals (in a electrolyte) for datalogging. I was wondering if it is possible to use a DAC (sinking), to measure the current directly (instead using a shunt)? and maybe use a ADC for the voltage measurements. If possible, how should I configured it?
Best regards.
 

Hi,

A DAC can not measure...it´s an analog output.

It doesn´t depend whether there are "dissimlar metals" or not.
--> all depends on voltage range and current range. This is what you have to specify.

Klaus
 

Yes, but a DAC can source a current and also sink a current, and was wondering if I could use this fact. The ranges are 400-800mV and 1uA -100uA.
 

Hi,

any resistor can sink current, but can´t measure something.
Any battery can source current but can`t measure anything.

400..800mV, 1uA...100uA. Nothing unusual.
Where do you see the problem?

Klaus
 

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